Philipp Ahmann (born 1974) is a German conductor, especially known as a choral conductor. He has been the director of the NDR Chor from 2008 to 2018. Since 2020, Ahmann is the MDR Rundfunkchor's artis
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc014dba5b9d9a608809b14b436d53b26636417b6003e22b6610bc0db37e1fb7. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/daca487f-c93f-46e9-80f4-b80e7f69630f.json and https://artists.proofprofile.net/proofs/artist/daca487f-c93f-46e9-80f4-b80e7f69630f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Psalm 100: "Jauchzet dem Herrn, alle Welt", MWV B. 45
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522ac55d4bec36ae01293019fb48b359a0586ec42e591e83869fc7aacf9b7176. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306401.
3 Psalms, Op. 78: No. 1, Psalm 2 "Warum toben die Heiden", MWV B. 41 (Revised Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e655dc909306458dcc55a8335fba52140c260007e6ed1f24fb919345dea7df9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306402.
3 Psalms, Op. 78: No. 2, Psalm 43 "Richte mich, Gott", MW B. 46 (revised version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c325c0c7fbf436b6b46318206b867201c2960a8b379f53ee4ae949d89e1e9a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306403.
3 Psalms, Op. 78: No. 3, Psalm 22 "Mein Gott, warum hast Du mich verlassen", MWV B. 51
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc0662945d33988a67c972fdd32c2b9fabb2aa2c0636e921841ec8272747f5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306404.
2 Sacred Choruses, Op. 115: No. 1, Beati mortui
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc482e2a9f7907e72c70f85069e77dab2d230790a9ec816bee372993fa30e80a5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306405.
2 Sacred Choruses, Op. 115: No. 2, Periti autem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7849e6f626808e94bfe6f3c304ac52de18872169897d835d96f885a953ce187. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306406.
Missa brevis, MWV B. 57 "Die deutsche Liturgie": No. 3, Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd866f2af092b3e4ec50ece9b9a62c86139e34897b98046375123b9185172e3eb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306407.
Missa brevis, MWV B. 57 "Die deutsche Liturgie": No. 4, Ehre sei Gott in der Höhe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a419c138bb06e0ed831d7e3962fbdc5c04b2e00bbf53357938afabdc28bdadd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306408.
Missa brevis, MWV B. 57 "Die deutsche Liturgie": No. 10, Heilig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b93786e24580f83bd1bdc52deff4111128c2c4b55b13c560bb7f2ae703b4cb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306409.
Zum Abendsegen "Herr, sei gnadig", MWV B. 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753de364977e1750fafd4b71c0123cf1dab0f084f73a1b677d8423c7944970ae. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccd6ec319f38e843524feedc62ab69f3904756a383631373082425349dade25. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306411.
Denn er hat seinen Engeln befohlen über dir, MWV B. 53
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d3f1810766629713072f51bdec771ccdb5c85b15f800af39c958dcd2a72d73. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306412.
3 Motets, Op. 69: No. 1, Herr, nun lässest du deinen Diener in Frieden fahren fahren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146e9242bc180611c163075d6f3de60e60882c26727f65cdbc78f6cd0226bf05. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306413.
3 Motets, Op. 69: No. 2, Jauchzet dem Herrn, alle Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeab84c26c48d0cd9731d74c3c4950128f44011eefb82b268b3f5453bf90b785. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306414.
3 Motets, Op. 69: No. 3, Mein Herz erhebet Gott, den Herrn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49c57aa4c53d1a81ec151d05acdbb42f9fd942ee71c55f52e81dfead1012e9b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c81c811c65c5bbc3efab95187e564edfa751c590d17daa263536d23e134e4d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422306416.
No. 14, Singet dem Herrn ein neues Lied, SWV 35
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96c15047ef637d87b0ba3e1a39adf227e0dfa64c1a7b47510a0623389559ef5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEDS52241301.
No. 4, Verleih uns Frieden genädiglich, SWV 372
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c11a3fee651302df85d3492899c45c6a39ff151c394e37a23c4bfbb6e72616d. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEDS52241303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bec7f879ef41b0c4eb109be2f57cdb1c28d20f3ded2aeac4cf9051224a19983. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEDS52241305.
Christmas Songs from Germany & All Over the World, Vol. 2
Weihnachtslieder aus Deutschland und aller Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b08ee5500ffbb65030032ec267fcb2cee62ca91f3df1aa5b343aaae214142b3. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1676010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5722635632135e6f7b25bed1ca717c7f7c7d77b4b87edf74cec74eef4d39ecb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1676020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e4c4e025983367534d5bdd79e3a24d0dbf138feac9008cc686d610607c98c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEX1676030.
Adeste fideles (Arr. C. Thiel for Mixed Choir)
Frizzante: Celebrating Vocal Music Celebration
Es ist ein Ros entsprungen - Weihnachtliche Chormusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886e6360188e0be2c68ca9b54af13092bd3adeea1e53a5d13b7043f62ba0d866. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901538101.
Jul, jul, strålande jul (Christmas, Radiant Christmas) (Sweden)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd64022d0ee45ae493d8e3e8c7d9ac920df7bd2a3978fb4b1532a97495ee5f17. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901538102.
Shchedryk (Epiphany Carol), "The Carol of the Bells" (Ukraine)
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Adventi ének (Veni, veni Emmanuel) (Hungary)
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Ave Maria (version for 4 part choir) (Brazil)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bac8b3afcb29986ffbb4e267023cffdc41a31046db9038b1b6f754d26bfea3f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901538118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ee57b4a298ce9cca7388d4f49a8a4ba8e0b65d3194dbe5de8f38a68da7cfa. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901538127.
Stille Nacht (Silent Night) (Salzburg, Austria)
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Nine(Birds)Here [Works for Choir and Saxophone Quartet]
Vier doppelchörige Gesänge, Op. 141: I. An die Sterne
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Vier doppelchörige Gesänge, Op. 141: II. Ungewisses Licht
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Drei gemischte Chöre: I. Abendfeier in Venedig
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3a967d4976870df10f1c9303e90b823952afc3dbdb4c8b1a2dac0ca80eb30c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB421901502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a823b5d2a3751143daee0efdab7618243d5c21154c9f6efea6d312a11f8605. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB421901503.
Romanzen und Balladen, Op. 67: No. 4, Ungewitter
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Quatrains Valaisans, Op. 206: I. Pays, arrêté à mi-chemin
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Quatrains Valaisans, Op. 206: II. Rose de lumière
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Quatrains Valaisans, Op. 206: III. L'Année tourne
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Quatrains Valaisans, Op. 206: IV. Chemins qui ne mènent nulle part
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9 Sacred Pieces: No. 1, Cheruvimskaja pesn' No. 1
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Liturgy of St. John Chrysostom, Op. 41: No. 6, Cheruvimskaja Pesn'
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A Quattro Cori (16-Stimmige Werke für vier Chöre von Fasch, Benevoli und Mendelssohn)
Christmas Songs from Germany & All over the World, Vol. 3
In coena Domini ad missam, MH 628: No. 2, Christus factus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a059085f7062a34c90d995bf0be15ddeb25bbf26a54f0ca5ddea84991a20b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422003810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9a98a80f6bcf61f80b952bfb6e901bb96139c6f29e65b78e5b5b41a932f2de. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422003815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8244e623cc2522e89ec40e16345e76ccf84b36d9252f6af1e466954074325e93. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901748406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632a0fa7c2212d3a8977ab5356201f0e03113deeb5162f32e8904176703daac7. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901748417.
Also hat Gott die Welt geliebt, SWV 380 (Version for Unaccompanied Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d86b6884ad3778cb17e7d2a68f29e4865189a56b43a7631150a224226c42d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901748424.
Mendelssohn: Missa brevis, MWV B. 57 "Die deutsche Liturgie": No. 3, Kyrie
Mendelssohn: Denn er hat seinen Engeln befohlen über dir, MWV B. 53